Improvement in hooks



UNITED STATES PATENT OEEIcE.

WM. M. KNIGHT AND JONATHAN ORNE, OF MARBLEHEAD, MASS.

IMPROVEMENT IN HOOKS.

A To all 'whom it may concern:

lence being had tothe accompanying drawing,

and to the letters of reference marked thereon.

The nature of our invention consists in attaching to the ordinary hook that passes through the staple a spring, which prevents thehook from being withdrawn from the staple without the application of lateral pressure directly upon the spring.

- To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and operation.

We make the hook of any of the ordinary forms, and of any material, and attach thereto a spring, A B, attaching it to the hook at the point B by a rivet, or in any convenient manner.

The most convenient and least expensive kind of spring is a simple strip of metal attached to the hook at such an angle that the end A, in its natural position, will be at such a distance from the opposite part ofthe hook as to come under the staple when the'hook is fastened, and prevent the hook from being withdrawn without pressing uponthe side of the strip. Upon the removal of the pressure the strip will resume its original relative position.

Specification forming part of Letters Patent No. 49,535, datedAugust 22, 1865.

The spring willv yield so as to allow the hook to pass into the staple.

We do Ilot, however, conne olirselves to the kind of spring above described, but use any convenient spring. By the use of our improvement the hook caunot be sprung out ot' the staple bya blow upon the back of the door, shutter, or gate, nor

pushed up by a lever inserted from the other side of the door, &c., nor easily raised by young children or animals. A i

In the drawing, A B represent the spring or strip upon which the spring operates, and` B the point at which the strip is attached to` the hook. The black lines show the improved hook as it appears out of the staple, andthe red lines show it as it appears in the staple to fasten the door, &c.

What we claim as our invention, and desire to secure by Letters Patent, is-

The application to a common hook, substantiallyot the'shape exhibited in the drawing accompanying this application, of a spring which will allow the hook easily to pass into the staple, but will preventit from being withdrawn therefrom without the application ot lateral pressure upon the spring,substanlially g as herein described;

WILLIAM M. KNIGHT. JONATHAN H. oENE. 

